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Game Boy references
Enter the Celadon Condominiums next to the Pokemon Center in Celadon City. Use the elevator to get to the third floor. When you exit, your friend will tell you about the GB Sounds. Talk to the man next to the globe after collecting all of the Kanto badges to get the GB Sounds Device.
Enable the 'GB Sounds' option before entering the Union room, then trade with someone, and it will play the classic trade music.
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! and ? Unown
Acquire all other twenty six Unown (A through Z), and the ! and ? Unown will appear in the Hall Entrance.
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Pokewalker maps
Successfully complete the indicated task to unlock the corresponding Pokewalker map:
| Beyond the Sea | Trade for an International Pokemon in the GTS in Goldenrod City. |
| Volcano Path | Get 10,000 Watts and the National Dex. |
| Scary Cave | Get 20,000 Watts and the National Dex. |
| The Resort | Get 80,000 Watts and the National Dex. |
| Be victorious inner's Path | Participated in the Wi-Fi Event from May 6th to June 25th, 2010. |
| Blue Lake | Get 2,000 Watts. |
| Town Outskirts | Get 3,000 Watts. |
| Rally | Participated in the Wi-Fi Event during January 29th through February 28th, 2010 in Japan. |
| Sightseeing | Participated in the Wi-Fi Event during November 14th, 2009 through to January 11th, 2010 in Japan, and from April 17th to May 31st, 2010 in Korea. |
| Night Sky's Edge | Trade a fateful-encounter Jirachi onto Pokemon HeartGold or SoulSilver. |
| Hoenn Field | Get 5,000 Watts and the National Dex. |
| White Lake | Get 50,000 Watts and the National Dex. |
| Resort | Get 80,000 Watts and the National Dex. |
| Stormy Beach | Get 65,000 Watts and the National Dex. |
| Quiet Cave | Get 100,000 Watts and the National Dex. |
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| Suburban Area | Get 500 Watts. |
| Sinnoh Field | Get 25,000 Watts and the National Dex. |
| Beautiful Beach | Get 200 Watts. |
| Icy Mountain Rd. | Get 30,000 Watts and the National Dex. |
| Tree House | Get 15,000 Watts and the National Dex. |
| Big Forest | Get 40,000 Watts and the National Dex. |
| Rugged Road | Get 50 Watts. |
| Dim Cave | Get 1,000 Watts. |
| Warm Beach | Get 7,500 Watts and the National Dex. |
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| Yellow Forest | Participated in the Wi-Fi Event from April 1st to May 5th, 2010. |
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Secret box wallpapers and Pokemon eggs
Go to Violet City Pokemon Center. Tell the man next to the PC certain words when he asks you for your opinion. Use this
website to generate these words. This will unlock special box wallpapers and Pokemon eggs in your game.
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Trainer Card colors
Successfully complete the indicated task to unlock the corresponding color. You can earn stars by completing the following tasks: defeating the Elite Four, finding all Shining Leaves, and capturing all 493 Pokemon (not including event-only Pokemon).
| Gold Card | Gain four stars. |
| Blue Card | Gain one star. |
| Silver Card | Gain three stars. |
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| Bronze Card | Gain two stars. |
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| Black Card | Gain five stars. |
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In-game reset
While you are playing this game, press L + R + Begin + Select.
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National Pokedex
Overcome the Elite Four, then go to the S.S. Aqua ship in Olivine City to get the National Pokedex.
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Hidden items in Ruins Of Alph
In the same rooms where you have to complete a picture puzzle of Kabuto, Aerodactyl, Ho-Oh, or Omanyte, there is a plaque that has a word that is spelled using Unowns. Finish the following steps to get the hidden items:
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